Malicious PDF — malware analysis report

Static analysis result for SHA-256 0560f6060c5df883…

MALICIOUS

PDF

73.0 KB Created: 2021-03-15 16:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03a25bd00dd1ce0aab139abb2a6cab30 SHA-1: b3cd3920a372cf08ee44d3bbda4b6057c2b9506b SHA-256: 0560f6060c5df883676d5c29a229404a51b3c6e9acbce9c00f53e6a91838e72f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a significant portion of which point to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/wb?keyword=what%20ply%20is%20red%20heart%20super%20saver%20chunky PDF link annotation
    • https://tanofome.weebly.com/uploads/1/3/5/3/135316841/xusewovafetudon.pdfIn PDF document text
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/35af7b59ee.pdfIn PDF document text
    • https://walonani.weebly.com/uploads/1/3/4/3/134372970/3f007c127908f3.pdfIn PDF document text
    • https://denupadifujufo.weebly.com/uploads/1/3/0/8/130813478/acc45cfb8d3d3.pdfIn PDF document text
    • https://gifolavetufo.weebly.com/uploads/1/3/2/6/132695571/tonimuwodapupe.pdfIn PDF document text
    • https://lafefozusut.weebly.com/uploads/1/3/4/5/134597047/d0207de.pdfIn PDF document text
    • https://jefelowomiwit.weebly.com/uploads/1/3/4/5/134599681/8bf4e1df84.pdfIn PDF document text
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/vofawabot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_ba4e97be09bc4f55820a8d9ce10a1ade.pdf?index=trueIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_73f00f395048409190d080c306ff1fe2.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_ae926e1570d641aba150e26636ab1560.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_1c1236b321a34d02b726af2c2f20a6e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d014fa2d-7b61-4c03-ac76-fd8f6cdc0a5b/7_month_old_baby_milestones_nhs.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_a7cde45403f647eea945d36d46abf36a.pdf?index=trueIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_fcd810db7c49483d9754c210a37df391.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/977d0042-7166-4bbf-9286-f4028bff877d/31213247755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f9c6361-89aa-425c-a050-9f1bb381abee/what_is_a_lawyer_employment_contract.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fdd4a2c-6916-472f-8d63-73c3114e8b5e/inductrix_fpv_plus_manual.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_cd0a0c686dcd4132a965e8efe1496c0b.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA80 5400 bytes
SHA-256: fafe682fb50dd1379dbd8b28c97fde1f380b375ca74c1a6b4a1c41cea3dd9aa1
font_01_sfnt_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 11908 bytes
SHA-256: e282ecda3a55970b1b82df2fbf1e7d79ab8d871210a4f554b6e85a925dbe8ac7